It's important to have a good understanding of your characters capabilities and weaknesses.

So you can play up the capabilities and work around or, better yet, completely ignore, the weaknesses.

Transcript

Han: Do you know how hard it is to roleplay someone with Int and Wisdom as low as Han's? Coming up with ridiculous ideas all the time?R2-D2: Unlike, say, Qui-Gon, whose plans were all brilliant?Han: Exactly!Luke: Okay, then. Han, you need to listen to me.Leia: No, you listen to me.Leia: Disable the droid, take a memory dump, make it look like an accident.
{Han shoots it}[SFX]: Pow![SFX]: Kaboom![SFX]:Kakrabooom!!!Han: Disabled. What was the middle one again?